• Title/Summary/Keyword: Ground control system

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Analysis of TM/TC data protocol of Military Unmanned Aerial Vehicles (군용 무인항공기의 TM/TC 데이터 프로토콜 분석)

  • Hong, Su-woon;Kim, Young-kil
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.391-393
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    • 2017
  • Unmanned aerial vehicles(UAVs) operating in the military for various purposes are designed to transmit information collected according to the purpose to GCS(Ground Control System), and to transmit/receive the vehicle's operational control and status information using wireless communication(or datalink). Currently, the military UAV systems in operation in Korea use unique communication methods, protocols, and message structures for each system. In this paper, we analyze the TM/TC data protocol of two types of military UAV systems currently under development and propose a more efficient TM/TC message design scheme in wireless communication(or datalink) environment. And we will discuss issues to be considered for standardization of technology for ensuring interoperability with many UAVs or newly introduced UAV systems.

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JPEG Performance analysis for COMS LHGS Design (통신해양 기상위성 LHGS 설계를 위한 JPEG 성능 분석)

  • Bae Hee-Jin;Seo Seok-Bae;Ahn Sang-Il;Jung Sung-Chul;Kim Eun-Kyou
    • Proceedings of the KSRS Conference
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    • pp.381-385
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    • 2006
  • 2008년 발사를 목표로 개발되고 있는 통신해양기상위성(COMS: Communication, Ocean and Meteorological Satellite)는 기상 관측과 해양 관측 임무 및 통신 임무까지 수행하는 정지궤도 위성이다. 통신해양기상위성은 크게 탑재체와 지상국으로 나눌 수 있고 지상국은 다시 통신 임무를 위한 CTES(Communication Test Earth Station), 해양/기상 임무를 위한 IDACS(Image Acquisition and Control System), 그리고 위성 관제와 운영을 위한 SGCS(Satellite Ground Control System)로 구분된다. 이 중 IDACS의 서브시스템 중 하나인 LHGS(LRIT/HRIT Generation Subsystem)는 LRIT/HRIT(Low Rate Information Transmission/High Rate Information Transmission)를 생성하고 배포하는 기능을 가지고 있다. 관측 종료 후 LRIT/HRIT 전송 완료까지 15분 이내로 이루어져야 한다는 기상청의 요구사항을 만족하기 위해서 JPEG 압축 시간도 중요한 요소로 고려되어야 한다. 그래서 본 논문에서는 MTSAT에서 받은 LRIT/HRIT의 자료 처리를 바탕으로 lossless JPEG와 lossy JPEG의 압축 시간을 측정하여 압축률을 비교하여 성능 분석을 해보기로 한다. 이렇게 도출해낸 수치자료는 COMS LHGS 설계에 활용할 수 있다.

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Development of Operation System for Network of Multiple UAVs (복수 무인기 네트워크 통합 운영 시스템 개발)

  • Kim, Sung-Hwan;Cho, Sang-Ook;Kim, Sung-Su;Ryoo, Chang-Kyung;Choi, Kee-Young
    • Journal of the Korean Society for Aeronautical & Space Sciences
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    • v.39 no.11
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    • pp.1042-1051
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    • 2011
  • In this paper, a total operating environment equipped with onboard wireless communication systems and ground-based mission control systems is proposed for simultaneous operation of multiple UAVs. A variety of operating structures are studied and classified systematically based on types and usages of the components. For each operating system, the strength, weakness and reliability aspects are investigated. Based on these results, a proper operating system configuration is determined and components are developed for mission formation flight. Proposed system can make a formation flight of various UAVs, execute complex missions decentralizing mission to several UAVs and cooperate several missions.

Design of an Autonomous Hover Control System for a Small Quadrotor

  • Raharja, Gilar B.;Kim, Gyu-Beom;Yoon, K.J.
    • International Journal of Aeronautical and Space Sciences
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    • v.11 no.4
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    • pp.338-344
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    • 2010
  • This paper discusses the development of the control system of a mini quadrotor in Konkuk University for indoor applications. The attitude control system consists of a stability augmentation system, which acts as the inner loop control, and a modern control approach based on modeling will be implemented as the outer loop. The inner loop control was experimentally satisfied by a proportional-derivative controller; this was used to support the flight test in order to validate the modeling. This paper introduces the mathematical model for the simulation and design of the optimal control on the outer loop control. To perform the experimental tests, basic electronic hardware was developed using simple configurations; a microcontroller used as the embedded controller, a low-cost 100 Hz inertial sensors used for the inertial sensing, infra-red sensors were employed for horizontal ranging, an ultrasonic sensor was used for ground ranging and a high performance propeller system built on an quadrotor airframe was also employed. The results acquired from this compilation of hardware produced an automatic hovering ability of the system with ground control system support for the monitoring and fail-safe system.

A Study on the Hazard Identification for the Implementation of A-SMGCS (A-SMGCS 구현을 위한 위험요소 식별에 대한 연구)

  • Hong, Seung-Beom;Choi, Seung-Hoon;Choi, Youn-Chul
    • Journal of Advanced Navigation Technology
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    • v.19 no.1
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    • pp.41-47
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    • 2015
  • Recently, it is actively under study for the implementation of advance surface movement ground control systems (A-SMGCS) level IV in Korea. To ensure the safety of the A-SMGCS system needs the safety assessment, and Eurocontrol is encouraged to perform the functional hazard assessment, preliminary system safety assessment, and system safety assessment to the safety assessment of A-SMGCS. In this paper, we identify the hazard of A-SMGCS through a functional hazard assessment. Therefore, we will identify 29 types of hazard for the A-SMGCS level IV and serve as important data to evaluate the severity of each hazard.

Designing on Scenario-based Drone Platform to Enhancement Security (보안성 향상을 위한 시나리오 기반 드론 플랫폼 설계 연구)

  • Kim, Yanghoon;Hong, Chan-Ki
    • Journal of Platform Technology
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    • v.9 no.3
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    • pp.78-83
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    • 2021
  • The new industry drone research is increasing through convergence between 4th industrial revolution technology. In particular, the government indicates the D.N.A platform as a countermeasure of 4th industrial revolution. So, the research topics are remarkable which are using D.N.A platform. On the other hand, the drone for industrial and research has spatial factor based on sequential because, they performance scenario-based mission through control operation. When the drone flights as a control operation, they have necessity apply multi-dimensional methods to improve the security level. So, this study researched a scenario based drone platform to improve the security level. As a result, the space classified as a ground control system, drone, drone data server and designed the application method based on scenario security technology.

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Coverage Prediction for Aerial Relay Systems based on the Common Data Link using ITU Models (ITU 모델을 이용한 공용데이터링크 기반의 공중중계 시스템의 커버리지 예측)

  • Park, Jae-Soo;Song, Young-Hwan;Choi, Hyo-Gi;Yoon, Chang-Bae;Hwang, Chan-Ho
    • The Journal of the Korea institute of electronic communication sciences
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    • v.15 no.1
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    • pp.21-30
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    • 2020
  • In this paper, we predicted the propagation loss for the air-to-ground (A2G) channel between the ground control system and the unmanned aerial vehicle (UAV) using the prediction model for the aircraft recommended by the International Telecommunication Union (ITU). We analyzed the network coverage of the aerial relay system based on the medium altitude UAVs by expanding it into the air-to-air (A2A) channel. Climate and geographic factors in Korea were used to predict propagation loss due to atmospheres. We used the measured data published by the Telecommunication Technology Association (TTA) for regional rainfall-rate and effective earth radius factors to increase accuracy. In addition, the aerial relay communication system used the key parameter of the common data link (CDL) system developed in Korea recently. Prediction results show that the network coverage of the aerial relay system broadens at higher altitude.

Design of TM/TC data protocol of Military Unmanned Aerial Vehicles (군용 무인기의 TM/TC 데이터 프로토콜 설계)

  • Hong, Su-woon;Kim, Young-kil
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.22 no.3
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    • pp.506-512
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    • 2018
  • Unmanned aerial vehicles(UAVs) operating in the military for various purposes are designed to transmit information collected according to the purpose to GCS(Ground Control System), and to transmit/receive the vehicle's operational control and status information using wireless communication(or datalink). Currently, the military UAV systems in operation in Korea use unique communication methods, protocols, and message structures for each system. Among these, the Division UAV is designed to transmit fixed size TM/TC data repeatedly and the Corps UAV is designed to transmit aperiodic TM/TC data to the variable length of the message-based. In this paper, we analyze the TM/TC data protocol of existing military UAV systems and present data protocol design method which is considered to be more efficient in wireless communication environment applied to equipment under development. And we will discuss issues to be considered for standardization of technology for ensuring interoperability with many UAVs or newly introduced UAV systems.

Development and Verification Methodology for Small Civil Unmanned Aerial Vehicle System based on Open System Architecture (개방형 시스템 아키텍처 기반의 소형 민간 무인항공기 시스템 개발 및 검증 방법)

  • Jo, Hyun-Chul;Park, Keunyoung
    • Journal of Platform Technology
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    • v.8 no.2
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    • pp.32-43
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    • 2020
  • The Unmanned Aerial Vehicle(UAV) system has been mainly used for military domains, but it also widely applied to used in the civilian domains. In civilian domains, low-cost and small-sized UAV systems are mainly applied in various industries. The software that operates UAV systems has a lot of common functions. However, even though there are many common functionalities of the software, changing the devices may cause a problem requiring software modification. These problems degrade interoperability, modularity and portability in UAV systems. In order to solve the problems, an Open System Architecture(OSA) has been proposed. In this paper, we propose a UAV system software architecture based on Future Airborne Capability Environment(FACE) standard. Our system can support UAV systems of various platforms in the civilian domains, which is supplied in small quantity batch production. And it has the advantages of software consolidation and portability. Finally, We describe the development and conformant methodology of the software based on the FACE standard using open development tools.

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Structure Design of Surveillance Location-Based UAV Motor Primitives (감시 위치 기반의 UAV 모터프리미티브의 구조 설계)

  • Kwak, Jeonghoon;Sung, Yunsick
    • KIPS Transactions on Software and Data Engineering
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    • v.5 no.4
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    • pp.181-186
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    • 2016
  • Recently, the surveillance system research has focused because Unmanned Aerial Vehicle(UAV) has the ability to monitor wide area. When the wide area are monitored, controlling UAVs repeatedly by pilots invokes the cost problem to operate UAVs. If monitoring path can be defined in advance, the cost problem can be solved by controlling UAVs autonomously based on the monitoring path. The traditional approach generates multiple motor primitives based on flied GPS locations. However, the monitoring points by UAVs are not considered by the generated motor primitives, the surveillance by UAVs is not performed properly. This paper proposes a motor primitive structure for surveillance UAVs to be flied autonomously. Motor primitives are generated automatically by setting surveillance points to denote surveillance targets accurately.